DTC 522655-1 - Short Term Closed Loop Correction Bank 1 Greater Than NOR 40% (Lean Engine Operation)
Common problems that may cause lean codes:
- Contaminated/clogged trim fuel injector's filter and/or LPG regulator's filter
- Contaminated/clogged trim fuel injector
- Faulty trim fuel injector or wiring
- Contaminated LPG fuel
- Low primary LPG fuel pressure (for trim fuel injector)
- Low secondary LPG fuel pressure (for carburetor)
- Clogged fuel hoses
- Contaminated/dirty carburetor
- Faulty fuel shutoff solenoids
- Engine overheating
- Exhaust leaks prior to or near oxygen (O2) sensor
- Manifold vacuum leaks
- Improper ECU grounds on engine block
- Faulty ECU injector driver 2
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